This is the TRP HY/RD Cable-Actuated Hydraulic Disc Brake. If you dont want to give up your cable brake levers, but want the benefits of a hydraulic disk brake system, TRP has what you need! TRP has delivered hydraulic performance to the developing road/cross disc market with an open hydraulic system that is fully compatible with all existing cable actuated levers, and provides the power and modulation of a hydraulic disk brake.